SMSL DA-9 Bluetooth 5.0 NJW1194 Hi-Res Audio High Quality Power Amplifier The strong and silent type Two years after the release of the SMSL DA-8 comes the DA-9, a Bluetooth amplifier that outstrips its predecessor up and down the specs sheet. From output power to SNR, everything that counts has been souped up. The DA-9 doesn’t add any new features to the DA lineage, but doing so would have possibly pulled focus from its philosophy of design: minimal features, maximal specs. This amp is an excellent choice for anyone in the market for a powerful bookshelf speaker amplifier from one of the most trusted names in audio. High power, low noise circuitry SMSL assembled a crack team of circuitry for the DA-9. With its Japanese NJW1194 volume control chip and German Infineon class-D power amplifier chip, the DA-9 delivers a massive 150Wx2 of power with a whisperingly low 111dB signal-to-noise ratio.